Investor Presentaiton

Customers State-regulated utilities Segment summary as of 3/31/2023 DE South Carolina 1.2M 18% DE Virginia 2.7M 39% 7.0M state utility customers Dominion Note: figures may not sum due to rounding Energy® State summary Three months ended March 31 '21-'23 CAGR Customers 3/31/2023 (M) Gas Distribution 3.0M 43% DE Virginia 1.1% 2.7 DE South Carolina 2.4% 1.2 Electric 1.7% 0.8 Gas 3.6% 0.4 Gas Distribution 1.5% 3.0 UT/ID/WY 2.5% 1.2 NC 2.2% 0.6 OH 0.2% 1.2 Total utility customers 1.5% 7.0 20 20

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